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- PHP Array Sorting: A Deep Dive into Performance and Algorithms
- PHP uses an optimized hybrid sorting algorithm. 1. The core is based on the fast sorting optimization of sorting with the three numbers and the small array insertion sorting. 2. In some scenarios, similar to Timsort to improve the performance of some ordered data. 3. Sort() and other built-in functions are better than usort(). Because they avoid user callback overhead, 4. Usort() needs to enter the PHP layer from C every time, resulting in a 2-5-fold performance decline. 5. Optimization strategies include pre-calculated values and using Schwartzian transformation to reduce duplicate calculations. 6. The large data volume should consider database sorting or external tools. 7. PHP sorting is unstable, and multi-field sorting needs to be implemented manually. 8. The memory consumption of large array sorting doubles, and performance and resources need to be weighed. Therefore, native sorting should be preferred and
- PHP Tutorial . Backend Development 135 2025-08-05 18:58:01
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- PHP Array Instantiation: A Performance and Memory Optimization Deep Dive
- The instantiation method of PHP arrays has a significant impact on performance and memory usage. The [] syntax should be used first, avoid dynamic expansion in loops, and consider SplFixedArray or generator for optimization; 1. Use [] instead of array() to reduce overhead; 2. Use array_fill() to reduce redistribution when predicting the size; 3. Use generators to reduce memory; 4. Unset large arrays in time; 5. Use SplFixedArray to index big data, because it has less memory and faster speed.
- PHP Tutorial . Backend Development 690 2025-08-05 18:57:01
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- How to use CSS logical properties for better internationalization?
- Replacephysicalpropertieslikemargin-leftwithlogicalonessuchasmargin-inline-start;2.Useinline-sizeandblock-sizeinsteadofwidthandheightforresponsivelayoutdimensions;3.Applytext-align:startorinset-inline-startforflow-relativealignmentandpositioning;4.Ut
- CSS Tutorial . Web Front-end 146 2025-08-05 18:48:01
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- Tutorial on delivering TLS version information between Nginx and PHP-FPM
- This article describes how to obtain TLS version information through client-side JavaScript scripts and pass it to server-side PHP-FPM processing. The core lies in using the free API provided by howsmyssl.com to obtain client TLS connection information through JavaScript, and then send this information to the server via GET or POST requests. This approach allows developers to execute different logic in PHP applications based on the client's TLS version.
- PHP Tutorial . Backend Development 614 2025-08-05 18:45:00
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- The `continue` Pitfall: Preventing Infinite `while` Loops in PHP
- Usingcontinueinawhileloopcancauseinfiniteloopsifincrementstatementsareplacedafterit,astheygetskipped;2.Topreventthis,incrementthecounterbeforecontinueoruseaforloopwheretheincrementispartoftheloopheader;3.Alwaysensuretheloopcounterisupdatedineveryiter
- PHP Tutorial . Backend Development 374 2025-08-05 18:43:01
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- Create vector effects of JPG images using PHP and Imagefilter
- This article will explain how to use PHP's imagefilter function to convert a JPG image into a black and white image with vector graphics effects. We will demonstrate through sample code how to achieve grayscale and enhance contrast to achieve a vector-like visual effect. This tutorial is for developers who want to use PHP to simply process images and generate images with specific styles.
- PHP Tutorial . Backend Development 196 2025-08-05 18:27:01
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- The $GLOBALS Array vs. The `global` Keyword: A Performance and Scope Analysis
- Theglobalkeywordisslightlyfasterthan$GLOBALSduetodirectsymboltablebinding,buttheperformancedifferenceisnegligibleinmostapplications.2.$GLOBALSprovidesdirectaccesstotheglobalsymboltableandallowsunsettingglobalvariablesfromwithinfunctions,whileglobalon
- PHP Tutorial . Backend Development 707 2025-08-05 18:24:02
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- How to use the placeholder attribute in HTML input fields
- Theplaceholderattributeprovidestemporaryhinttextininputfieldsthatdisappearswhenusersstarttyping.2.Itcanbeusedontext,email,password,search,andtextareainputstoshowexamplesorbriefinstructions.3.Alwayspairinputswithalabelelementforaccessibilityandneverre
- HTML Tutorial . Web Front-end 182 2025-08-05 18:22:21
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- Transforming Complex Data Structures with `array_column` and `array_walk_recursive`
- Use array_column() and array_walk_recursive() to efficiently process complex nested arrays in PHP; 1. When the data is a two-dimensional structure, use array_column() to directly extract the value of the specified key; 2. When the key values are nested too deeply, such as 'email' is located in the inner layer of 'profile', array_column() cannot be extracted directly. You need to use array_walk_recursive() to traverse all leaf nodes and collect the target value by judging the key names; 3. You can combine the two: first use array_walk() or array_walk_recursive() to organize the deep data into a flat structure, and then
- PHP Tutorial . Backend Development 159 2025-08-05 18:13:01
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- Beyond Switch: A Comprehensive Guide to PHP 8's Match Expression
- PHP8's match expression is a safer and concise alternative than traditional switches. It uses strict comparisons, no fall-through issues, has to deal with all cases or provides default, and returns values directly. 1. Match avoids fall-through errors caused by lack of break in switch; 2. Use strict type comparison to prevent accidents caused by loose type matching; 3. It can be used directly as an expression to assign or return to improve code readability; 4. Support multi-value matching and conditional expressions of PHP8.1; 5. Throw UnhandledMatchError when it is not matched and there is no default to enhance code robustness. Priority should be given
- PHP Tutorial . Backend Development 362 2025-08-05 18:12:02
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- How to create a CSS-only animated progress bar?
- Create a CSS-only animation progress bar only requires HTML structure and CSS animation; 2. Use the outer div as the progress bar track and the inner div as the fill part; 3. Define the appearance of the progress bar by setting the style of the outer div, including width, height, background and rounded corners; 4. The inner div uses a linear gradient background and combines the ::before pseudo-element to create a highlight sweep effect; 5. Use @keyframes to define the shimmer animation from left to right to achieve loading animation; 6. Optionally implement the fill animation through animatewidth, so that the progress bar looks gradually full; 7. Add prefers-reduced-motion support for accessible access, and disable the motion
- CSS Tutorial . Web Front-end 192 2025-08-05 18:11:00
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- Navigating the Labyrinth: Efficiently Processing Multidimensional PHP Arrays
- To efficiently process PHP multi-dimensional arrays, you must first understand the data structure and then choose the appropriate traversal method. 1. Use var_dump() or print_r() to analyze the array structure to determine whether it is a tree or mixed type, so as to determine the processing strategy; 2. For nesting with unknown depth, use recursive functions to traverse and pass the path key name to ensure that the context information of each value is not lost; 3. Use array_walk_recursive() to process leaf nodes with caution, but be careful that it cannot retain the complete path and only acts on scalar values; 4. Flatten the array into a single-layer structure separated by dots in a suitable scenario, which facilitates subsequent search and operations; 5. Avoid modification while traversing, ignoring data type differences, and excessive nesting.
- PHP Tutorial . Backend Development 402 2025-08-05 17:56:01
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- Submit a comment using PHP and cURL: A brief tutorial
- This article will guide you to submit comments to websites that support comments using PHP's cURL library. We will explain how to set cURL options, construct POST requests, and process server responses. Please note that the target website must actually support submission of comments via POST requests.
- PHP Tutorial . Backend Development 943 2025-08-05 17:54:00
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- Handling Deadlocks in MySQL: Detection and Resolution Strategies
- MySQL deadlock is a deadlock caused by two or more transactions waiting for each other to release lock resources. Solutions include unified access order, shortening transaction time, adding appropriate indexes, and sorting before batch updates. You can view deadlock information through SHOWENGINEINNODBSTATUS, or turn on innodb_print_all_deadlocks to record all deadlock logs. The application should catch deadlock exceptions, set up a retry mechanism, and record logs for troubleshooting, so as to effectively deal with deadlock problems.
- Mysql Tutorial . Database 746 2025-08-05 17:52:01
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